[Double satellite of a group D chromosome in father and sister of a trisomy 21 patient].
D000293:Adolescent; D002648:Child; D002869:Chromosome Aberrations; D002901:Chromosomes, Human, 13-15; D002904:Chromosomes, Human, 21-22 and Y; D005260:Female; D006801:Humans; D007621:Karyotyping; D008297:Male; D008875:Middle Aged; D010375:Pedigree; D014314:Trisomy
Double satellite d'un chromosome du groupe D chez le père et la soeur d'un trisomique 21.